| Yurajcocha | |
| Other Name: | Tintayari / Huampuni |
| Pushpin Map: | Peru |
| Location: | Peru Junín Region |
| Coords: | -12.5517°N -75.49°W |
| Length: | 5km (03miles) |
| Width: | 0.84km (00.52miles) |
| Elevation: | 4466m (14,652feet) |
| Yurajcocha Dam | |
| Location Map: | Peru |
| Dam Height: | 10.2m (33.5feet) |
| Plant Operator: | Electroperu |
Yurajcocha (possibly from Quechua yuraq white, qucha lake, "white lake"), Tintayari or Huampuni (possibly from Aymara wampu boat, -ni, a suffix, "the one with a boat") is a lake in Peru located in the Junín Region, Huancayo Province, Chongos Alto District. It is situated at a height of approximately 4466m (14,652feet), about 5 km long and 0.84 km at its widest point. Yurajcocha lies north of Acchicocha and northeast of Huichicocha. The lake belongs to the watershed of the Mantaro River.
In 1999 the Yurajcocha dam was built at the northern end of the lake at . The dam is 10.2m (33.5feet) high. It is operated by Electroperu.